CVE-2020-27347
HIGHCVSS 7.8/10EPSS 0.68%
Last modified
CVE-2020-27347 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. In tmux before version 3.1c the function input_csi_dispatch_sgr_colon() in file input.c contained a stack-based buffer-overflow that can be exploited by terminal output.. EPSS estimates a 0.68% chance of exploitation in the next 30 days.
Description
In tmux before version 3.1c the function input_csi_dispatch_sgr_colon() in file input.c contained a stack-based buffer-overflow that can be exploited by terminal output.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Tmux Project | Tmux | >= 2.9, <= 3.1b |
References
- https://github.com/tmux/tmux/commit/a868bacb46e3c900530bed47a1c6f85b0fbe701cPatch, Third Party Advisory
- https://raw.githubusercontent.com/tmux/tmux/3.1c/CHANGESRelease Notes, Third Party Advisory
- https://security.gentoo.org/glsa/202011-10Third Party Advisory
- https://www.openwall.com/lists/oss-security/2020/11/05/3Exploit, Mailing List, Third Party Advisory
- https://github.com/tmux/tmux/commit/a868bacb46e3c900530bed47a1c6f85b0fbe701cPatch, Third Party Advisory
- https://raw.githubusercontent.com/tmux/tmux/3.1c/CHANGESRelease Notes, Third Party Advisory
- https://security.gentoo.org/glsa/202011-10Third Party Advisory
- https://www.openwall.com/lists/oss-security/2020/11/05/3Exploit, Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-27347?
In tmux before version 3.1c the function input_csi_dispatch_sgr_colon() in file input.c contained a stack-based buffer-overflow that can be exploited by terminal output.
How severe is CVE-2020-27347?
CVE-2020-27347 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.68% probability of exploitation in the next 30 days.
How do I fix CVE-2020-27347?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2020-27347?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST